Straight bottom dump bailer



Feb. 16, 1937. R. R. CANDEE 2,070,982

, STRAIGHT BOTTOM DUMP BAILER Filed March" 28, 1936 Patented Feb. 16, 1937 UNITED STATES PATENT OFFICE 7 Claims.

This invention is a well bailer and is an improvement in the type of well bailer bottom shown in my Patent No. 1,505,624, of August 19, 1924.

An object is to provide a bailer whose separable parts are so constructed, arranged and interrelated as to avoid objectionable looseness of parts between which sand might possibly accumulate and interfere with quick and effective operation of the several elements.

A further object is to provide a bailer having a removable end shoe, carrying an inlet valve, and an upper body element to which the shoe is adapted to be easily and quickly attached, and detached with equal facility, and at the same time effecting the secure interlocking of the shoe and the body by a simple, substantial and reliable coupling device.

The invention consists in certain .advancements in this art as set forth in the ensuing disclosure and having with, the above, additional objects and advantages as hereafter developed, and whose construction, combination, and details of means, and the manner of operation will be made manifest in the description of the herewith illustrative embodiment; it being understoodthat modications, variations and adaptations may be resorted to within the scope, principle and spirit of the invention as it is more directly hereinbelow claimed.

Figure 1 is a side elevation and partial section axially of the bailer.

Figure 2 is a sectional elevation of the locking sleeve of the bailer.

Figure 3 is a side elevation of the bailer body.

Figure 4 is a plan of the shoe and the valve.

The bailer here shown includes an upper, tubular body 2 of suitable material and length and diameter and its lower end is externally threaded at 3 up to a substantial transverse shoulder 4.

Below the threads 3 the body is plain and is provided with one or more L-shaped slots 5 opening out to the lower end edge of the body, with the upper portion 5a of the slot extending laterally and preferably having its edges inclined with the same pitch as the threads 3.

Turnably mounted on the reduced, lower end of the body is a locking sleeve 1 threaded internally at 8 to screw onto the body threads 3; the upper end of the sleeve being adapted to make a good tight t against the shoulder 4 and so hold its position rmly when screwed up hard.

The lower end of the locking sleeve I has one or more straight longitudinally extending slots 9 which extend to a point above the body slot portion 5a.

Insertable into the bore of the lower end of the body 2 is the reduced, complementary, upper end of a tubular or shoe member I0, the outside diameter of the shoe, the sleeve and of the body being substantially uniform. 'I'he reduced part Illa of the shoe fits snugly in the body bore to prevent the objectionable accumulation of silt or sand which might tend to bind the parts.

One or more lugs I I are xed to or formed on the reduced Vpart Illa of the shoe and are adapted to slide in the slots of the sleeve when this is assembled on the body 2 to a position quite close to the shoulder 4 so as to allow the lugs II to be turned laterally into the lateral, inclined portions 5aof the locking slots.

`Mounted on the .upper end of the shoe I0 is a suitable, downwardly closing ap valve I2 which opens upward readily to allow entrance of material `being bailed from .a well as the bailer is lowered by a tool string in the usual manner. On upward movement of the string the valve I2 quickly closes under the trapped load and the string is pulled from the Well. 25

To unload the bailer the sleeve and the attached shoe I 0 are given a slight turn, preferably by a tool applied to the thick walled shoe I0, so as to withdraw the lugs from the locking slot portion 5a. Then by a straight relative movement of the bailer shoe downward from the body 2, as while this is held elevated, the lugs II move straight down the slots 9 in the sleeve.

It will be noted that the load of the material in the bailer is taken by the lugs I I locked in the slot portions 5a, and these lugs are reliably held in their place by the tight binding of the upper end of the sleeve 'l against the reacting shoulde 4 of the body 2. l

Not only is the shoe securely held in place by the binding of the sleeve against the shoulder 4 but an additional security is had by the binding of the shoe shoulder Illa against the edge 2a of the lower, reduced end of the body 2 as the shoe is pulled up by the bottom, inclined edge of the transverse, body slot portions 5a.

What is claimed is:

1. A well bailer having an upper body with an intermediate shoulder and a reduced part below the shoulder having screw threads, and the lower end of the body having a plurality of L-shaped slots opening to the bottom edge of the body and including transverse portions which are .inclined similar to the pitch of the said threads, an eX- teror sleeve internally threaded to screw onto the body threads and adapted to jam tightly against the body shoulder and the lower end of the sleeve having straight slots opening to the lower end thereof, and a valve-carrying shoe having an upper reduced end portion removably tted in the lower end of the said body and having a set of lugs slidable in the slots of the sleeve and laterally movable by rotation of the sleeve and the shoe into the transverse portions of respective L-slots in the body.

2. A well `bailer having a tubular body part whose lower end is provided with bayonet slots opening to its bottom edge, a sleeve part threaded on said body and having slots opening to its end and turnably, longitudinally registerable Vwith the open ends of the body slots, a shoe removably fitted to the lower end of the body and having lugs slidably fitting the registered slots in the said parts and turnable into transverse limbs of the bayonet slots, and meeting shoulders on said parts which frictionally bind said parts together to interlock the lugs in fixed position in the body and sleeve.

3. A well bailer having a tubular body part with wall slots opening to one end of the body, a sleeve part screwing on the body and having slots opening to one end of the sleeve part and registerable with the body part slots, the slots of one of said parts having lateral portions at their inner ends, and a shoe removably tting the body part and having lugs slidably fitting the slots in said parts and interlocking in said lateral slot portions; said body and shoe parts having reacting surfaces which frictionally bind when said parts are relatively turned while said surfaces are in contact, whereby to hold the lugs in their interlocking position.

4'. In a well bailer, a tubular body part having a transverse shoulder and a threaded portion and having wall slots extending longitudinally to land opening at one end of the body part, a sleeve turnably tted on the said body and engaging its threads and operative to bind against the said shoulder and being provided with Wall slots registerable with the slots in the body part, the slots in the body part including lateral portions, and a shoe removably attachable to the body part and having a set of lugs iitting and slidable into the slots of the body and the sleeve when these are in register and said lugs being shitable laterally into the lateral portions of the slots when the sleeve and the shoe are turned according to the direction of the lateral slot portions, and an inlet valve in the bore of the bailer.

5. A well bailer having telescoping, inner and outer, tubular elements threaded together and having opposed transverse shoulders adapted to irictionally bind on each other and said parts having registerable slots opened to the telescoped ends of said elements remote from said shoulders and the slots of one of said elements having inclined, transverse portions, and a tubular shoe member having a part telescoping into the said inner element and having a transverse shoulder to abut the near end edge of one of said elements and having lugs to enter the registered open ends of said slots and operative, when turned into the said transverse slot portions as the elements are relatively turned, to eect said abutment of the shoe against the said edge, and an inlet valve on the said shoe and removable therewith to unload the bailer.

6. A well bailer having a valve-carrying shoe, a tubular body element provided with longitudinal slots opening at one end of said element, a sleeve element screwing onto the body element and said elements having mutually reacting surfaces which frictionally bind when screwed together, said sleeve element having longitudinal slots registerable with the body slots and open at the end of the sleeve adjacent to the open ends of the body slots, and said shoe having lugs slidably fitting the registered slots, the slots of one element having transverse portions into which the lugs are adapted to shift to interlock the shoe as the said surfaces are relatively turned into binding relation.

'7. A bailer of the structure set forth in claim 6, yand in which said lateral portions of the slots in one element are so inclined as to cause the shoe to bind against a near portion of one of said elements.

RAPHAELR. CANDEE. 

